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Page Title:
INSUFFICIENT COOLING ACTION. (Cont) |
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 TM5-4120-384-14
TROUBLESHOOTING-Continued
Table
5-1.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step
5.
Check area near condenser guard and
fresh
air
inlet
for heat hource over 120F (40C).
Remove
heat
source.
Step
6.
Check sight glass after operating unit for 15
m i n u t e s with TEMPERATURE SELECTOR switch in maximum
COOLER position.
Center should be bubble free and
green.
If charge is low add refrigerant.
(See para
Bubbles may also be caused by clogged
(See para 5-31.)
Use great care to avoid contact with liquid
refrigerant or refrigerant gas being
discharged from any container under pressure.
Sudden and irreversible tissue damage can
result from freezing.
Wear thermal protective gloves and a face
protector or safety glasses in any situation
where skin or eye contact is possible.
Prevent contact of refrigerant
gas
with
flame
or hot metal surfaces.
Heat causes the refrigerant to break down and
form carbonyl chloride (phosgene), a highly
toxic and corrosive gas.
(See
Check
for
refrigerant
leaks.
Step
7.
Repair
or
change
defective
part.
High
voltage
can
kill.
Step
8.
(See
Check solenoid valves L1 and L2.
Repair
or
replace
if
defective.
5-8
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